The autoresponder also does not show correctly utf8 characters..
in some case with some characters as " ' @ . autoresponder does not work at all...
i think there has to be some parameter in sieve about utf8

Which of the two problems discussed here do you have? The first poster asked about reversing the order of textsts in the autoresponder while the second poster has a question about utf-8 support in dovecot.

Sieve is a international standard, so this is not related to ispconfig nor can we change that. What you can do is to use courier with maildrop instead of dovecot, courier maildrop is more flexible and has more functions then sieve.

From there mailbot can be substituted for the basic mail/mailx command to send out the autoreply only back to the user instead of trying to change the reply order. Ultimately it's auto response we want to be highlight ... I don't think anyone needs to have the original email echoed back to them.